Loom attachment for auxiliary pattern chain



Jan. 22, 1957 c. E. MQVETY 2,778,380

LOOM ATTACHMENT FOR AUXILIARY PATTERN CHAIN 5 Sheets-'She et 1 Filed June 5, 1953 g FIG-5 INVENTOR. B SBDEE. McVETY ATTORNEYS Jan. 22, 1957 c. E. M VETY 2 778,

LOOM ATTACHMENT FOR AUXILIARY PATTERN CHAIN Filed June 5, I953 I 5 Sheets-Sheet 2 16s 94 94 FIG -2 INVENTOR.

CLYDE .5 Mc VETY 32714.; 5%..

ATTORNEYS C- E. M VETY LOOM ATTACHMENT FOR AUXILIARY PATTERN CHAIN Jan. 22, 1957 5 Sheets-Sheet 3 Filed June 5, '19s:

FIG-7' Jan. 22, 1957 c. E. M VETY 2,778,380

LOOM ATTAdHMENT FOR AUXILIARY PATTERN CHAIN Filed June 5, 1953 5 Sheets-Sheet 4 -INVENTOR.

. CLYDE E. McVETY ATTORNEYS Jan. 22, 1957 c. E; MOVETY LOOM ATTACHMENT FOR AUXILIARY PATTERN CHAIN 5 She'ets-Sheet 5 Filed June 5, 1953 FIG-l9 FIG 20 PATTERN NORMAL PATTERN MODIFIED L NORMAL PATTERN MODIFIED PATTERN l0 |2-2,4 6 810 I2 2 4 6 a :0 l2

IOI22468 FIG-22 ATTORNEYS United States Patent LOOM ATTACHMENTFOR AUXILIARY PATTERN Clyde E. McVety, riqua; Ohio, ,assignor m The Orr Felt 26:! Blanket Company, Piqua, Ohio, a corporation of Application June :5, 19 53 ,'Serial N 0.. 359,740 11 Claiins. c1. 139- This inve liifln relates to looms, and in particular to an improved attachment for .a loom for varying the actuation of the loom harness by the pattern chain thereof.

' This invention is an improvement and refinement of the novel device illustrated in the co-pending John L. Rainer and'Carl Molander application, Serial Number 292,302, filed June 7, 1952, now issued as Patent No. 2,724,414 and. assigned to thesame .assignee as the instant. applicatiom In the previously filed application referred to, there was arranged in a loom a basic pattern chain for controlling the vibrator leverscarrying, in .the usual manner, vibrator gears formovernentinto engagement. with either one or the other of two counterrotat'mg cylinder gears, and which vibrator gears were. connected by vibrator connectors with jacks, thatwerc, in turn, connected by harness straps with the harness frames of the loom. Such a loorn arrangement is well-known, and it is also known that with a given basic pattern, chain, the pattern being woven in the. loom will repeat at least every time. one length of the pattern chain has. passed beneath the vibrator levers.

According to. the previous invention, this pattern was varied by providing auxiliary vibrator levers havinglost motion connections with certain ones of. the regular vibrator levers, so. that upon actuation of the. auxiliary levers the main vibrator levers would be actuated; that were connected thereto, while the. main vibrator levers could be actuated by the basic pattern chain independently of the auxiliary levers. to which they werev connected.

In this previously filed application. a substantially standard multiplier head, was modified and was. provided with a group of auxiliary vibrator levers. that were connected, by flexible cables passing over a, pair of spaced idler pulley setsand connected with a corresponding number of the main. vibrator levers. Theflexibility of the cables permitted lifting; of the. main vibrator levers independently of. the auxiliary levers, whilev the inextensibi-li-ty of'thecab-les, causedlifting .of the main vibrator levers. in unison with the auxiliary levers that were connected therewith.

The arrangement briefly described above, more. fully described in' the Rainer ct al. application referred to, had certain drawbacks which the present inventionovercomea, In: the first place, the shifting ofthemainvibratorlevers up and down between their two operative positions must be accomplished in an accurate andv positive manner not only to insure a, properly woven product, but also to prevent breakage of any parts. of the loom. It was found that the flexible cable connection between the auxiliary vibrator levers and the. main vibrator levers was at fault in that there was sufficient resilience and stretch in these connections that after a period of operation, the connections would. become too long and constant inspection. and, adjustment of the cables was necessary in order to maintain the loom in proper operative condition, 7

Similarly, because of the necessity of positively actuating the main vibrator levers by the auxiliary vibrator levers, a cable of substantial size had to be employed and no cables were. found having ahigh enough degree of flexibility to prevent them from occasionally binding or from abrading the pulleys or becomingthemselves abraded or weakened. Y

The arrangement of parts in the multiplier head that obtains from a simple conversion thereof accordingto the previously filedapplication referred to above is such that service of the multiplier head when necessarywas quite difiicult, and for this reason the arrangement'was never quite satisfactory from a maintenance standpoint.

Having the foregoing in mind, it is a primary object of the present invention .to provide an improved construction for a loom device of the nature referred to which will eliminate the difiiculties referred to above. I

A still further object is the provision of anarrangement in a loom for effecting a control of the main .vibrator levers thereof which will override the control .exerciscd on the said levers by the main or basic pattern chain for obtaining pattern variations in the woven prodnot which otherwise could only be accomplished by an excessively long and complex pattern chain.

A still further object is the provision of a mechanism according to the foregoing object which provides an absolutely positive overriding control of the main vibrator levers, while at the same time eliminating any interference whatsoever with their operation by the main pattern chain when the overriding control is not effective.

A still further object is the provision of an arrangement of the nature described which is readily serviced and maintained in good operating condition at all times.

A particular object of this invention is; the provision of a control device for rendering the overriding corrtrol mechanism inoperative at any desired time.

These and other objects and advantages, will become more apparent upon reference to the following description taken in connection with the accompanying drawings, in which:

Figure 1 is a more or less diagrammatic view showing the vibrator mechanism of a loom and its connection with the harness frame actuated thereby and the physical relation thereto of the auxiliary vibrator lever that exercises an overriding control on the main vibrator lever;

Figure 2 isan elevational view of themodified overhead multiplier according to my invention looking in from the head end of the loom;

Figure 3 is a'perspective view showing more in detail the lost motion. connection between an auxiliary vibrator lever and the main vibrator lever on which it exercises an overriding control; I

Figure 4 is a view showing the connections between the four auxiliary vibrator levers and the four main vibrator levers: which they control, illustrating the manner in which the connections are arranged therebet'ween so that the connections do not interfere with each other and also showing the operative connection between one of' the auxiliary levers and the mechanism through which it operates a shifter fork;

Figure 5 is a fragmentary View showing still another connection from an auxiliary lever which is' operable for actuating a box control device;

Figure 6 is a side elevational view of the modified overhead multiplier showing the drive to the driven shafts thereof;

Figure 7 is a perspective view showing details of'constructi'on of the modified multiplier;

Figure 8 is a fragmentary view showing one of the shifter mechanisms of the device;

Figure 9' is a perspective view showing a latch member employed for retaining one of the shifting devices initsactuated position;

Figure is a sectional view, indicated by line Ill-19 on Figure 2, and illustrating the arrangement of two oppositely rotating pinwheels adapted for selective engagement with a star wheel for reversibly driving the shaft on which the star wheel is mounted;

Figure 11 is a fragmentary perspective view showing the shifting mechanism associated with the pinwheels of Figure 10;

Figure 12 is a sectional view, indicated by line 1212 on Figure 2, showing still another pinwheel drive and the star wheel driven thereby;

Figure 13 is a fragmentary perspective view showing the arrangement of the several shafts in the device;

Figure 14 is a sectional view, indicated by line 1 PM on Figure 2, showing a detent mechanism which retains one of the shafts of the device in its several indexed positions;

Figure 15 is a sectional view indicated by line 1515 on Figure 2, showing the chain cylinder over which the main pattern chain passes, the star wheel which drives the chain cylinder, and the pinwheel which drives the said star wheel;

Figure 16 is a perspective view similar to Figure 11, but showing the reversing chain and the cylinder over which it passes and the lever controlled thereby that controls the pinwheels of Figures 10 and 11;

Figure 17 is a perspective view showing the auxiliary vibrator levers, the auxiliary pattern chain which controls the levers and the connection of the auxiliary levers with the main vibrator levers;

Figure 18 is a diagrammatic representation of the main or basic pattern chain;

Figure 19 is a diagrammatic representation of a portion of the auxiliary pattern chain 154;

Figure 20 is a diagrammatic representation of a portion of the reversing chain 186;

Figure 21 is a diagrammatic sectional view showing a portion of the woven product; and

Figure 22 is a view similar to Figure 21, but showing another portion of the woven product.

Referring to the drawings somewhat more in detail, the harness. indicated at 10, is connected by the harness straps 12 with the opposite ends of jack 14, as by the jack eyes 16. The jack is rotatable about a supporting shaft 18 and has connected thereto at pin 20 the vibrator connector 22. Vibrator connector 22 is pivotallv connected at 24 to the vibrator gear 26. which is rotatably mounted on pivot axis 28 on the main vibrator lever 30, which is pivoted at its outer end on shaft 32.

Positioned above vibrator gear 26 is cylinder gear 34, and below the said vibrator gear is cylinder gear 36. These cylinder gears rotate in respectively opposite directions, and when vibrator lever 30 is lifted, vibrator gear 26 is brought into engagement with cylinder gear 34, which drives the vibrator gear to move vibrator connector 22 ri htwardly, thus to rock jack 14 clockwise about shaft 18 and bring about lifting of harness frame 10. Similarly, when vibrator lever 30 is lowered to bring vibrator gear 26 into engagement with lower cylinder gear 36, the vibrator gear is driven in a direction to move vibrator connector 22 leftwardly, thereby to rock jack 1% counterclockwise about shaft 18, whereby harness frame 10 is moved to its lower position.

At this point it might be pointed out that a typical loom comprises a number of harness frames, jacks, and vibrator assemblies identical with the one illustrated, with the cylinder gears 34 and 36 being common to all of the several vibrator mechanisms.

In the usual manner, each vibrator lever has a pad 33 on the bottom thereof engageable with cams 4t on a pattern chain 42 that runs over a chain cylinder 44. The chain 42 comprises a plurality of transversely extending bars on which the cams 4-0 can be mounted to form risers, or left off to form sinkers, and by arranging the risers and sinkers according to a predetermined pattern, the vibrator levers can be made to rise and fall in the proper order to obtain the desired pattern of Weave. The chain cylinder 44 is, of course, driven in synchronism with the other parts of the loom, so that the entire mechanism operates as an integral unit.

According to the present invention, it is desired to impart to certain ones of the vibrator levers 30 an upward movement at a time when there would be no cam or riser 40 on the main pattern chain aligned therewith. The purpose of this arrangement is to provide for variations in the pattern of the weave along the length of the woven product, which otherwise could only be obtained by making the main pattern chain 42 of excessive length.

According to the present invention, the ones of the main vibrator levers 36) which it is desired to bring under an auxiliary control in this manner are provided with pins or studs 46 which engage the slotted eye 48 on the end of a rod 5% threaded at its upper end to a turn buckle 52 which has threaded in its upper end a second rod 54 having an eye 56 at its extreme upper end that pivotally engages pin or stud 58 carried by an auxiliary vibrator lever 60.

Reference to Figures 1 and 3 will serve to indicate that each main vibrator lever 30 is free to rise and fall in accordance with the arrangement of the cams aligned therewith on the main harness chain 42 without any interference from the connected auxiliary lever 60, whereas upward movement of each lever 60 will be accompanied by upward movement of the connected vibrator lever 30. The connection between the levers is rigid and inextensible and can thus be accurately adjusted as to length and will remain of that length for an indefinite period. Similarly, since the levers 60 are directly over levers 30 and the connections therebetween are vertical, the arrangement is such that there is absolutely no interference with the normal movements of levers 30 by the basic pattern chain at any time.

In Figure 4 it will be seen that the loom arrangement according to this invention comprises a total of fourteen of the main vibrator levers 30, of which eight at 39:: control the regular warp threads of the product, and two at 301) control the selvedge warp binders and through lines of binding, and which ten levers are under the control of the main pattern chain 42 at all times; and four levers at 30c which are arranged to be under the joint control of the main pattern chain 42 and an auxiliary pattern chain to be more fully decribed hereinafter, and which controls the auxiliary vibrator levers 60 that are connected to the last-mentioned main vibrator levers.

The warp threads passing through the harness frames that are connected with the last-mentioned group of four main vibrator levers are binder warps provided in addition to the regular warp threads, and which warp binders, as more fully explained in the Ramer et al. application referred to above, and also in the co-pending Vincent C. Keily and Adelphis Smith application, Serial Number 283,912, filed April 23, 1952, now Patent No. 2,722,951 and asisgned to the same assignee as the instant invention, are for the purpose of binding together the two plies of a two-ply blanket along predetermined spaced lines to provide for channels through which an electric heating element is run.

The said two of the main vibrator levers 3% are continuously under the control of the main pattern chain 42 and are connected with a pair of harness frames through which selvedge binder warps run for the purpose of continuously binding the two plies of the blanket being woven along at least the side edges thereof, and, on occasion, down the center thereof.

As will also be seen in Figure 4, the auxiliary levers 60 are six in number, and include four which are connected with the four main vibrator levers Silo that pertain to the warp binders, one, at Gila, which operates a box mecha nism for the purpose of throwing a colored thread into the woven product to indicate a cutting point, and one speed, but in respectively opposite directions.

amassed lever, at 60b, that is connected to a lever 62' rotatable about a pivot 64 and operable to thrust shift rod 202 leftwardly against spring 296 for a purpose which will become apparent hereinafter.

Reference to Figure will indicate that lever 60a is connected by a rod 70 with a lever 72 pivoted at 74 and having a roller 76 bearing on the upper surface of an arm 78 rotatable about a pivot 80 and connected with a rod 82 that serves to operate the box mechanism referred to.

The overhead multiplier device on which the auxiliary levers 60 are mounted comprises, as will be seen in Figures 2 and 7, the end frame portions 84 and 86, and

between whch extend a plurality of shafts, indicated at '88, 90, 92, and 94 in Figures 2-, 6 and'10' through 16. Shaft 88 carries a gear 96 meshing with a drive gear 98 that is driven in synchronism with the cylinder gears previously refererd to. Gear 98' also drives an idler gear 100 that meshes with a gear 102 on shaft 94. By this arrangement, shafts 88 and 94 are driven at the same These gears and the shafts on which theyare mounted also rotate in synchronism with the chain cylinder 44' over which the main pattern chain passes.

The auxiliary vibratorlevers 60 are arranged, as can best be seen in Figure 17, pivotally supported on, a rod 1'50 and have pads attheir front ends adapted for engagement by the cams or risers 152 carried on the cross bars of an auxiliary pattern chain 154 that passes about a chain cylinder 156 to which is drivingly connected 2. star wheel 158'. The chain cylinder 156 and star wheel 158 are rotatably mounted on shaft 92.

As will be seen inFigure 15,, a pin-Wheel'q1'60 which is fixed to shaft 90, is: operatively associated with star wheel 1'58 fordriving the star wheel and the connected chain ;cylinder'156 in rotation.

In Figures 2, 7', '10 through 12, and '14,,it will be noted that shaft'90 on which pinwheel 16.0 is drivingly mounted has fixed thereto adjacent the frame member 84 a star wheel 162, and which star wheel is adapted for being driven either by pinwheel 164 on shaft 88 or by pinwheel 166 on shaft 9.4. These last-named pinwheels are slidably keyed to their respective shafts, and each. has associated therewith a shifter fork 168.

.As will be best seen in Figures 2 and 1-1, the device of this invention comprises an intermediate frame member 170 having a pivot stud .172. on which there is mounted a 3-armed lever 174 havingan arm engaging each of the shifter forks 168, and having its third arm at 176; attached to an actuating rod 178 that leads upwardly and is connected with a reversing lever 180.

The compression springs 182 normally bias lever 174 in a direction to pull downwardly on lever 180, and in the lower position of the said lever, pinwheel 164 is in driving engagement with star Wheel 162, whereas, when lever 180 is raised, lever 174 is rotated so as to disengage pinwheel 164 from star wheel 162 while engaging pinwheel'166 therewith. Inasmuch as the said pinwheels rotate in respectively opposite directions, it will be. ap-

parent that the direction of rotation of shaft 90 can be determined by the, position of lever 180, and this, in turn, determines the direction of, rotation of pin-wheel 160 and star Wheel 158 driven thereby and chain cylinder156. connected with the star wheel.

. The lever 180, as is best illustrated in Figure 16, is also pivoted to rod 150 and has an arcuate pad underneath its, outer end adapted for engagement by the cams or risers, 184 of a reversing chain 186 that passes about chain cylinder 188 that is connected with star wheel 19.0, with the said star wheel and chain cylinder being fixed to shaft 92. The reversing chain 186in operation is indexedfrom each position to its next position and has .a dwell period, and for this reason there is also fixed to shaft 92 .a roll 192 having notches in its periphery -adapted for receiving a roller 194 carried on the end of spring pressed arm 196 that is pivoted on rod 150. By this arrangement, the driving of shaft 92 can be discon- -tinuous, but it will rest in predetermined indexed posislidably keyed to shaft 94. Pinwheel 198 has a shifter fork 200 fixed to a rod 202 slidable in bracket members 204 that are carried by the auxiliary frame member 170. As will be seen in. Figure 7, a compression spring 206 continuously urges rod 202 rightwardly to disengage pinwheel 198 from star wheel 190, while a collar 208' on the said rod is adapted for engagement 'by the end of one arm of the 2-arm lever 62 which was previously referred to as having its other arm connected with auxiliary b.

Means are provided for selectively shifting pinwheel 160 out of engagement with star wheel 158 to interrupt the driving of auxiliary pattern chain 154 by slidably keying the said pinwheel to shaft 90 and providing the pinwheel with a shifting fork 210 secured to rod 212 that is slidable in the one bracket 204 and has connected to its other end a bar 214 extending upwardly to above the upper transverse frame member 215 of the multiplier device.

Bar 214 is also connected with a rod 218 slidable through a fixed member 220' and the other one of brackets 20.4 at the opposite side of the device. A compression spring 222 urges rod 218 leftwardly so that normally .bar 214 and rod 212 are positioned so'that pinwheel 160 is in operative engagement with star wheel 1 58'. Bar 214, however, can be manually moved to the right as it is viewed in Figures 2 and 7, and in this manner-bring about disengagement of the pinwheel from the star wheel.

At this time a latch member 224 pivoted to the arm will fall behind the bracket member 220, as illustrated in Figure 9, andhold bar 214 in its shifted position, thus preventing further movement of the auxiliary pattern chain until bar 214' is again released to the influence of spring 222. Reference to Figures 18' through 22 will serve to reveal the manner in which the device according to this invention operates. In Figure 21 there is shown a fragmentary sectional view through the woven product produced on the loom, and which product, it will be noted, is a 2-ply textile article in which warp threads a and b are in the top ply and Warp threads 0 and d are in the bottom ply.

In Figure 18 the main pattern chain will be seen to have rows of earns marked a, b, c, and a, and which pertain respectively to the warp threads a, b, c, and d; In additiomin Figure 18, the bars of the pattern chain are numbered 1 throu h 1 2, and these same numerals are applied to Figures 21 and 22.

The pattern chain in Figure 18 also comprises a row of cams marked'Bl and a second row of cams marked B2. These rows of'cams pertain to binder warp threads. In Figure 21, the solid black thread shown therein is the binder warp B1, and it will be observed that this binder warp interweaves with both plies of the textile article at the left side of Figure 21, and which'is marked normal 1 pattern, but only interweaves with the topply of the textile article at the right side of Figure 21, and which is marked modified pattern.

In Figure 22, the binder warp B2 is illustrated, and at the left side of the view, which is marked modified pattern, the warp thread interweaves with both plies of the textile article, while at the right side of Figure 22, which is marked normal pattern, the warp binder interweaves with only the lower ply.

The portions of Figures 21 and 22 which are marked normal pattern are those patternsthat are imparted to the warp binders B1 and B2'between rows of cams marked B1 andBZ in'Figure 18, whereas those portions of" Figures 21 and 22 marked modified pattern designate the character of the pattern for the warp binders B1 and B2 when the overriding control according to the present invention is operative.

The auxiliary pattern chain which exercises the overriding control is illustrated in Figure 19, and will be seen to comprise a first row of spaced cams marked R, a second row of cams marked Bill and a third row of cams marked B2. The chain in Figure 19 is located in operative registration with the chain of Figure i8, and it will be noted that the cams in the rows Bi and B2 of Figure 19 are so positioned that they line up with the nurnbered 8, 9, and id of the main pattern chain.

Inasmuch as the overriding control of this invention is repeatedly exercised for a considerable length of the blanket, it is of advantage to reciprocate the auxiliary chain back and forth over each different portion thereof, whereby this chain can be made substantially shorter than would otherwise be possible. The mechanism for bringing about reversing of the auxiliary chain has been previously described, and consists of the reversing lever 13% which, when lowered, causes movement of the auxiliary chain in the same direction as the main pattern chain, and, when lifted, causes movement of the auxiliary pattern chain in the opposite direction.

The chain that controls the movements of lever 154! is illustrated in Figure 20, wherein it will be seen to comprise a single row of cams spaced along the chain with certain adjacent ones of the cams having a single bar therebetween, and certain other adjacent ones of the cams having three bars therebetween.

When the loom is in operation, assuming the main pattern chain and the auxiliary pattern chain to be in registration and both moving in the same direction, namely, leftwardly as they are viewed in the drawings, the first Bl cam on the auxiliary pattern chain at 3% will be ineffective because it is located at a point where there is already a cam in the B1 row of Figure 18. The next Bl cam in Figure 19, indicated at 3%, however, will be effective because it is positioned where there is no Bil cam in the Figure 18 chain.

Mounted on the same bar with cam 392 is a reversing cam 364 which actuates lever dill) to bring about an indexing movement of the reversing chain. At this time, the reversing chain will move one of its cams under reversing lever 184i, and this will reverse the direction of movement of the auxiliary chain, so that earn 3% will become effective to give an overriding control on bar it) of the chain of Figure 18. Movement of the auxiliary chain in the reverse direction will then continue until reversing cam 3% moves into efiective position, which will bring about another indexing movement of the indexing chain to carry a bar beneath lever 18%, whereupon the auxiliary pattern chain is again reversed so as to move in the forward direction.

This reciprocating of the auxiliary pattern chain will continue until the reversing chain presents a bar to the reversing lever 180 instead of a cam at the time cam 394 is in effective position. When this occurs, the auxiliary pattern chain will continue movement in the forward direction, and at this time, the earn 3% of the auxiliary pattern chain will become effective when bar 1% of the main pattern chain is in operative position to etfect the overriding control desired.

The auxiliary pattern chain now continues in its forward direction, and when the reversing cam Elli moves into etfective position and causes indexing of the reversing chain, still another bar will be presented to the reversing lever 18% so that the auxiliary pattern chain will still continue to move in the forward direction. However, the reversing chain is now in such a position that the next indexing movement thereof will bring a cam beneath lever 18% which will cause reversal. of the auxiliary pattern chain, and therefore, when the auxiliary pattern chain has advanced to the point that the reversing cam 312 is in reflective position, the auxiliary pattern chain will again commence the reciprocating movement. At this time, however, the B2 cams of the auxiliary chain will be effective for exerting an overriding control on the B2 warp binder.

From the foregoing it will be seen that the auxiliary pattern chain can be reciprocated in selected zones therealong for controlling the warp binders and that the auxiliary pattern chain can be set up so that either one or the other, or both, or neither of the warp binders are effective for binding the two plies of the article being Woven together.

In practice this characteristic of this invention is availed of in the weaving of two-ply blanket shells for receiving electric heating elements. The blanket shells are basically two-ply tubular woven construction with selvedge binders at the side edges that bind the two plies together continuously, and with one or more other continuous lines of binding running lengthwise of the blanket inwardly of the side edges. The warp binders B1 and B2 that are controlled in accordance with this invention provide other lines of binding spaced across the width of the blanket that define channels for receiving the electric heating element.

To facilitate locating the electric heating element in the blanket shell, the lines of binding provided by the warp binders B1 and B2 are staggered across the blanket and the blanket is provided with an open portion at its opposite ends. In the length of such a blanket there will thus be portions where neither warp binder is binding, other portions where both of the warp binders are binding, and still other portions where only one of the warp binders is binding.

It will be understood that the principles of this invention could be applied for effecting other pattern variations in woven products, if so desired, and the same advantages would obtain of positive overriding control of the vibrator levers with a minimum of expense and equipment, and with the greatest of case in arranging and setting up the main and auxiliary pattern chains.

It will also be appreciated that whereas the invention is illustrated exercising control over only four of the vibrator levers of the loom, as many of these levers could be brought under the auxiliary control that would be desired to produce the pattern variations required for the particular product being Woven.

It will be understood that this invention is susceptible to modification in order to adapt it to different usages and conditions, and, accordingly, it is desired to comprehend such modifications within this invention as may fall within the scope of the appended claims.

I claim:

1. In a loom; a vibrator lever for controlling the harness of the loom, a basic pattern chain movable beneath the vibrator lever and having cams spaced therealong for lifting the lever, an auxiliary lever directly over the vibrator lever, an auxiliary pattern chain movable beneath the auxiliary lever and having cams spaced therealong for lifting the auxiliary lever, means connecting said chains for movement in unison, and an inextensible connection extending vertically between the auxiliary lever and said vibrator lever and connected to both thereof whereby lifting of the auxiliary lever will also lift the vibrator lever, said connection including lost motion means whereby said vibrator lever can lift independently of said auxiliary lever.

2. In a loom; a vibrator lever for controlling a harness frame of the loom, a basic pattern chain movable beneath said vibrator lever and having cams spaced therealong for lifting the lever, an auxiliary lever directly above the vibrator lever, an auxiliary pattern chain movable beneath said auxiliary lever and having cams spaced therealong for lifting the auxiliary lever, means connecting said chains for movement in unison, a rod extending vertically between said levers and pivotally connected therewith so that lifting of said auxiliary lever will also lift "-"afr'rspso saidiribrator lever, and the: connection ofi "said 'rodwith one of said leverscomprising 'l'ostnrotion rneanswhere'by said vibrator lever .canlift independentlyiof said auxiliary said vibrator lever,andfhaving cams .spaced therea'long for lifting said vibrator lever, .an 'auxiliaryilever pose -.ti oned.directly above said vibrator .lever, an auxiliary pattern .chainmovable beneath said, auxiliary .lever and v.inclurlingcams spaced vtherealongjfor:liftingv said auxiliary lever, means connecting said chains formovementinunison, a rod extending vertically between said levers and pivotally-connected withithet-auxiliaryllever,apin in the vibrator lever andnaneye having an elongated slot therein on the lower end "of the rod engaging said pin whereby lifting oflthe auxiliary lever-will also lift the vibrator lever but whereby lifting-movements--of said vibrator. lever can 'take place independedtlwdfsaid auxiliary 'l'eveiz' '4.;In aloomhaving-a harness frame; a vibratormechanism including a vibrator lever for controlling said .harness frame, a basic pattern .chainniovable beneath said vibrator 'lever' and having cams spacedtherealong for lift-ing said vibrator lever, an auxiliary lever positioned directly above said vibrator lever, an auxiliary pattern chain movable beneath said auxiliary lever and including cams spaced therealong for lifting said auxiliary lever, means connecting said chains for movement in unison, a rod extending vertically between said levers and pivotally connected with the auxiliary lever, a pin in the vibrator lever, and new having an elongated slot therein on the lower end of the rod engaging said pin whereby lifting of the auxiliary lever will also lift the vibrator lever but whereby lifting movements of said vibrator lever can take place independently of said auxiliary lever, said rod including means for adjusting its length to provide for a precise relationship between said levers.

5. In a loom of the nature described; a plurality of vibrator levers for controlling the harness frames of the loom, a basic pattern chain movable beneath said levers and having cams thereon for lifting the said levers, a plurality of auxiliary levers positioned above said vibrator levers, one auxiliary lever being directly above each vibrator lever, an auxiliary pattern chain movable beneath said auxiliary levers and having cams thereon to lift the said auxiliary levers, means connecting said chains for movement in unison, a rod pivotally connected with each of said auxiliary levers and extending vertically downwardly therefrom to one of said vibrator levers, and a slotted connection between each of said rods at its lower end and one of said vibrator levers wherebylifting of the auxiliary levers will lift said vibrator levers whereas said vibrator levers can be lifted independently of said auxiliary levers.

6. In a loom of the nature described; a plurality of vibrator levers for controlling the harness frames of the loom, a basic pattern chain movable beneath said levers and having cams thereon for lifting the said levers, a plurality of auxiliary levers positioned directly above said vibrator levers, an auxiliary pattern chain movable beneath said auxiliary levers and having cams there-on to lift the said auxiliary levers, means connecting said chains for movement in unison, a rod pivotally connected with each of said auxiliary levers and extending vertically downwardly therefrom to one of said vibrator levers, and a slotted connection between each of said rods at its lower end and one of said vibrator levers whereby lifting of the auxiliary levers will lift said vibrator levers whereas said vibrator levers can be lifted independently of said auxiliary levers, each of said rods including screw threaded means between its opposite ends for adjusting its length, and said screw threaded means being staggered to provide for close grouping of said rods.

-axis,' an auxiliary ,pattern-chain'movable beneath said auxilia-ry levers and having cams spaced'therealong so the auxiilarylevers are raised and lowered during movement at the "auxiliary chain, a rigid finextensible connection extending directly vertically downwardlyfrom .each of .saidauxiliary levers .to the vibrator lever there- 'beneath and pivotally connected with bothsaid levers .so that lifting vof the auxiliary levers -.will .be accomplished by the lifting .of the connected vibrator levers, each said connected vibrator lever being movable upwardly independently. ofsaid. connection whereby the vibrator levers caniliftiindependently of their pertaining auxiliary levers andthe connection .therebetween, and means for driving .said rbasic .patternc'hain and auxiliarypattern chain in :synchronism.

8. Ina loom ofthe'nature 'describedand having a plurality of harness frames; a vibrator mechanism for each harness frame including a vibrator lever pivoted, on a horizontal :axis, a basic pattern chain movable beneath said vibrator levers and having cams spaced therealong for raising and lowering said levers during movement of the chain, a plurality of auxiliary levers positioned directly above said ones of said vibrator levers and also pivoted on a horizontal axis, an auxiliary pattern chain movable beneath said auxiliary levers and having cams spaced therelong for raising and lowering said auxiliary levers during movement of the auxiliary chain, an adjustable but non-extensible connection extending directly vertically downwardly from each said auxiliary lever to the vibrator lever directly therebeneath and-connected with both levers so that lifting of the auxiliary lever will lift the pertaining vibrator lever and said connection including lost motion means whereby lifting of the said vibrator lever can be accomplished independently of the auxiliary lever, a drive for driving said basic pattern chain continuously in one direction, and a reversible drive for said auxiliary pattern chain connected to and operated in synchronism with the drive for said basic pattern chain.

9. In a loom of the nature described and having a plurality of harness frames; a vibrator mechanism for each of said harness frames including a vibrator lever pivoted on a horizontal axis, a basic pattern chain movable beenath said vibrator levers having cams spaced therealong for periodically lifting said levers, a plurality of auxiliary levers directly above said vibrator levers also pivoted on a horizontal axis, an auxiliary pattern chain movable beneath said auxiliary levers having cams spaced therealong for periodically lifting said auxiliary levers, a rigidly inextensible but collapsible connection extending from each auxiliary lever to the vibrator lever directly therebeneath, a one-way drive for driving the basic pattern chain, a reversible drive for driving the auxiliary pattern chain in synchronism with the basic pattern chain, a reversing means for controlling the direction of movement of said auxiliary pattern chain, and a lever controlled by said auxiliary pattern chain for operating said reversing means, the said drive for said auxiliary pattern chain comprising a sprocket over which the chain passes, a starwheel connected with the sprocket, and a pinwheel meshing with said starwheel, and there being manual means for shifting said pinwheel out of engagement with said starwheel for adjustment of the loom, or for operation thereof without the influence of said auxiliary levers.

10. In a loom of the nature described; a plurality of vibrator levers, a plurality of auxiliary levers positioned directly above said vibrator levers, an auxiliary pattern chain movable beneath said auxiliary levers and having cams spaced therealong for periodically lifting said auxiliary levers, a rod pivotally connected with each said auxiliary lever and extending vertically downwardly and having a slotted connection with the vibrator lever directly therebeneath whereby lifting of the auxiliary lever will cause lifting of the connected vibrator levers whereas the vibrator levers can lift independently of the auxiliary levers, a barrel over which the auxiliary pattern chain passes, a starwheel connected with said barrel, a pinwheel meshing with said starwheel, a reversible drive for said pinwheel including a shaft to which the pinwheel is slidably keyed, a shifting fork for the pinwheel, and a manually operated lever for shifting said pinwheel out of engagement with said starwheel for adjustment of the loom and for operation thereof without the influence of said auxiliary levers.

11. In a loom of the nature described; a plurality of vibrator levers, a plurality of auxiliary levers positioned directly above said vibrator levers, an auxiliary pattern chain movable beneath said auxiliary levers and having cams spaced therealong for periodically lifting said auxiliary levers, a nod pivotally connected with each said auxiliary lever and extending vertically downwardly and having a slotted connection with the vibrator lever directly therebeneath whereby lifting of the auxiliary lever will cause lifting of the connected vibrator levers whereas the vibrator levers can lift independently of the auxiliary levers, a barrel over which the auxiliary pattern chain passes, a starwheel connected with said barrel, :1 pinwheel meshing with said starwheel, a reversible drive for said pinwheel including a shaft to which the pinwheel is slidably keyed, a shifting fork for the pinwheel, and a manually operated lever for shifting said pinwheel out of engagement with said starwheel for adjustment of the loom and for operation thereof Without the influence of said auxiiiary levers, spring means urging said pinwheel toward engagement with said starwheel, and latch means for latching said manually operated lever in its pinwheel disengaged position.

References Cited in the file of this patent UNITED STATES PATENTS 1,236,770 Scott Aug. 14, 1917 1,997,286 Zimitz Apr. 9, 1935 2,672,894 Robinson Mar. 23, 1954 2,724,414 Rainer et al. Nov. 22, 1955 FOREIGN PATENTS 332,675 Great Britain July 31, 1936 

